Digital refraction distortion correction with an astigmatic coherence sensor

Daniel L. Marks, Ronald A. Stack, David J. Brady

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We demonstrate the sensing and correction of an isoplanatic refractive distortion (not lens aberrations), using the complete measurement of the partially coherent field in an aperture that the previously described astigmatic coherence sensor provides. Isoplanatic distortions, and in general distortions that do not cause energy loss, maintain the orthogonality of the coherent modes. We use the fact that a common distortion will occur to all coherent modes to separate the distortion from the source behind it, rather than requiring a reference source at a different wavelength. Digital deconvolution was performed on the full four-dimensional partially coherent field for simultaneously computing the distortion and the source intensity distribution.

Original languageEnglish (US)
Pages (from-to)6050-6054
Number of pages5
JournalApplied optics
Issue number29
StatePublished - Oct 10 2002
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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